Stefany Shaheen maintains a lead in trader consensus for the New Hampshire First Congressional District Democratic primary due to her stronger early polling numbers, established local profile as a Portsmouth city councilor, and endorsements from both U.S. senators plus a major labor union. The open-seat race follows Representative Chris Pappas’s decision to seek a Senate seat, creating an opportunity where Shaheen’s family political ties and name recognition provide an edge over challengers. Maura Sullivan, a former Obama administration official and Marine Corps veteran, holds a fundraising advantage and has highlighted differences on housing, healthcare, and foreign policy at recent candidate forums, yet trails in surveys amid ongoing questions about her residency history. The remaining contenders, including Carleigh Beriont and Heath Howard, show limited support in available data as the September 8 primary approaches.